Governor



Sept- 20, 1949. y R. R. DULONG 2,482,161

l GOVERNOR Filed July 17. 1944 2 Sheets-Sheet l irren/EY.

. vice in every position of Patented Sept. 20, 1949 UNlrEn srArEsrArENr orrlcr. l

Roger lt. Dulonz.'

Grosse ruime Farms, Mich.,

lassignor to Carter Carburetor Corporation,

St. Louis, Mo., a corporation of Delaware Application July 17, 1944, Serial No. 545,344-

1o claims. l

This invention relates to governors for internal combustion engines and consists particularly in a novel governor of the static pressure type which incorporates new and effective means to counter-balance the action of the suction dethe valve so as to maintain the governed,k speed substantially constant under all load conditions.

The difficulty with static pressure governors in the past has been that the governed speed varies considerably under load and no load conditions. This is because the counter-balancing means is not wholly effective. Furthermore, the attempts tc obtain perfect counter-balancing of the valve at all speeds and loads have resulted in rather complicated and expensive devices. Also, the adjustment of prior devices to conform to different engine requirements has not been wholly satisfactory.

An object of the present invention is to provide a governor of the static pressure type having effective means for counterbalancing the suction device at all speeds and under all load conditions.

Another object is to provide a simplified governor for internal combustion engines.

Another object is to provide simple and eective means for adjusting the governor in accordance with various engine requirements.

These objects and other more detailed objects hereafter appearing are attained by the device illustrated in the accompanying drawings in which Fig. 1 is a side view, partly sectioned, of an automotive carburetor having'the novel governor applied thereto, the combination governing valve and throttle being shown closed and the cover of the governor box being removed.

Fig. 2 is a similar view showing the lower part of the carburetor only, with the governing valve wide open.

Fig. 3 is a view similar to Fig. 2, but showing the governing valve in an intermediate position.

Fig. 4 is a horizontal section taken substantially on line 4-4 of Fig. 1, position.

The carburetor in the-figures includes a downdraft mixture barrel 6 enclosing a series of venturis l into the smallest of which discharges the main fuel nozzle 8. A constant level fuel bowl 9 is formed integral with the mid portion of the barrel and feeds fuel through the usual metering elements (not shown) to the main nozzle. An idling passage is also shown, in part, at I which discharges adjacent the edge of the throttle when with the box cover in` closed, in the usual manner. The lower end of the barrel is flanged as at II for attachment to the engine intake manifold. A butterfly throttle valve I2 is mounted in the lower part of the barrel on a shaft I3 and controls the discharge of mixture from the carburetor to the engine. Shaft I3 is located slightly to the right of the center line of the valve'for a purpose to be described hereafter.

A box I5 is formed on the lower part of the barrel and receives one projecting end of throttle shaft vI3 as shown inv Fig. 4. A lever I6 1s formed rigid with the throttle shaft within box I5 and has a slotted lower extremity, with a series of holes I8. A pin I9 secured in one of these holes receives a wire hook 20 connected to a coil spring 2I which is adjustably anchored to a screw 22 threaded in a nut 23 which is seated in a cylinder 24 projecting vfrom box I5. A cap 25 on cylinder 24 may be removed to permit the application of a screw driver to screw 22 for rotating the screw to adjust both the tension of spring 2I and the effective number of turns thereof.

Formed on the opposite side of box I5 is a cupshaped member 30 having a cap 3I which secures in position a diaphragm 32. A stem 33 is secured to the center of the diaphragm and also to lever I6 on the throttle shaft. A passage 34 connects the space between the cap and the diaphragm to an air bleed valve chamber 36 and to a pair of passages 31. and 38, the former opening into the carburetor barrel posterior to throttle I2 and the latter opening into the upper end of the barrel which admits air thereto. A by pass 34a connects the suction passage to the mixture conduit anterior to the throttle for modifying the suction l eilect. Air bleed chamber 36 is controlled by an adjustable needle 39 with its head within box I5.

Box I5 is provided with a cover 45 which journals a stub shaft 46 having levers 41 and 48 rigid with the inner and outer extremities thereof, respectively. Lever 43 is apertured, as at 49, for connection to the usual throttle linkage and throttle return spring and to the accelerator pedal located in the .drivers compartment. Lever 41 carries an inwardly projecting pin 50 which overlaps lever I6 to form a one-way connection between the lever and the throttle linkage. This connection is such that when the accelerator pedal is retracted by its return spring, lever IG and the throttle valve are positively closed, as in Fig. 1. However, when the accelerator pedal is depressed, pinY 50 does not positively control the throttle, but

as at I1, providedbleed as.

In operation, the chamber at the left of diaphragm is exposed to suction and the space at the right of the diaphragm to atmosphere.

In order to'counter-balance the suction pressure on the diaphragm at every position of the throttle valve and at every speed, the following means are provided which, when hook 20 and spring 2| are connected to lever I6 in right hand hole I 8, as the throttle is closed from the fully open position in Fig. 2 to the closed position in Fig, 1, the eiective lever arm through which the spring resistance is exerted is gradually increased so that the resistance of spring 2| becomes increasingly more eiective. The plurality of holes f8 provide for adjusting this lever arm in accordance with various engine requirements. 4For instance, if pin i9 is in the extreme left hand hole I 8, this lever arm lrst increases then decreases during throttle closing, this condition :being essential for counter-balancing the suction device with some engines.

Additional counter-balancing eiect is obtained by means of slight unbalancing of the throttle disk on its shaft I3 in such direction that the ow of mixture through the carburetor tends to open the valve. 'This unbalancing is very slight and, of course, the effect of the air now on the valve, opposing the diaphragm, is increased as the valve closes.

Still additional counter-balancing is effected by means of air bleed passage 38 and adjusting screw 39. The effect of this air bleed upon the suction is greatest when the throttle is closed so that the dampening effect of the bleed is greatest at this time. When the throttle is wide open the effect of the bleed is not substantial.

All of the above elements contribute to the proper counter-balancing of the throttle and I have found that with their use I am enabled to construct a very satisfactory governor in which the governed sneed is closely maintained under wire variations of load conditions. Moreover, the governor can be adjusted to operate perfectly with different engines of the samegeneral type.

The invention may be modified in various respects as will occur to those skilled in the art and the exclusive use of all modiiications as come within the scope of the appended claims is contemplated.

I claim:

1. In a governor for an internal combustion engine, a governor valve responsive to pressure conditions in the engine intake conduit tending to close the valve as the engine speed increases, and means to counter-balance the effect of the intake pressure varyingly as the valve closes, comprising a lever movable with said valve, and a spring anchored at one end and pivotally connected to said lever at ing a plurality of pivotal elements for selective connection to said spring to manually adjust the counter-balancing torque applied to said valve.

2. In an engine governor, a pivoted valve subject to engine pressure conditions to control the speed of the engine, a lever rigid with said valve, and means to apply a force eccentrically to said lever to counter-balance the same, said lever havthe other, said lever havthe point of application oi counter-balancing force.

3. In an engine governor, a pivoted valve for controlling the ow of mixture through the engine intake conduit, a device responsive to intake suction for applying closing force to said valve, a lever movable ,with said valve and having a plurality of spring attaching elements-differently positioned angularly of the axis thereof, and a counter-balancing spring anchored at one end and connected to one of said elements.

4. In a governor for an internal combustion engine, a valve for controlling the mixture flow through the engine intake conduit, means connected to the valve tending to open the same, and a device responsive to suction tending to close said valve in opposition to said means. said valve having a pivotal mounting located oil' center in such direction that normal flow tends to aid said means in urging the valve open.

5. In a governor for an internal combustion engine, a pivoted valve for controlling the mixture now through the engine intake conduit, a suction responsive device tending to close the valve with increasing force as the suction increases, and a spring for counteracting said device tending to balance the valve in a predetermined position at each suction value, said valve being slightly unbalanced so that iiow in the intake conduit tends to open the same with increasing force as the valve closes to aid in the counter-balancing action. l

6. In a. governor for an internal combustion engine, a pivoted valve for controlling the flow of mixture to the engine, a suction responsive device urging the valve closes. said valve being mounted slightly off center in such direction that ilow tends to open the same so as to further aid in counte -balancing said suction device.

7. In a governor for an internal combustion engine, a governor valve mounted on a shaft, a lever rigid with said shaft, a suction responsive device having a connection to said lever for applying closing force to the valve, a counter-balancing spring anchored at one end balancing said device.

8. In a governor for an internal combustion en-l gine, a pivoted governor valve mounted on a shaft, a lever rigid with said shaft, a, suction responsive counter-balancing spring having an attachment to said lever for opening the valve in opposition to said device, said attachment being positioned so that the effective lever arm is varied as the valve closes, and a xed air bleed on the suction ROGER R. DULONG.

6 REFERENCES CITED The following references are-of record' vthe le of this patent:

UNITED STATES PATENTS 4 Number Name Date 1,188,995 Rice June 27, 1916 1,212,177 Benjamin 1 Jan. 16, 1917 2,209,421 Sar-nes July 30, 1940 2,359,230 Mallory Sept. 26,1944

FOREIGN PATENTS Number Country Date,

426,632 Great, Britain Apr. 8. 1935 

